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Solution: Integer to Roman

Explore how to convert integers into Roman numerals by applying a greedy algorithm. Understand the use of predefined value-symbol pairs and how subtractive forms like IV and CM are handled. This lesson helps you implement a straightforward method to generate correct Roman numeral representations for any input between 1 and 3999.

Statement

Given an integer, num, convert it to its Roman numeral representation.

Roman numerals are built using the following 77 symbols:

Symbol

Value

I

1

V

5

X

10

L

50

C

100

D

500

M

1000

Roman numerals are constructed by converting each decimal place value from highest to lowest using these rules:

  • If the value does not start with 44 or ...